Radiator.



PATENTED NOV. 21, 1905.

B" BRISGOE.

' RADIATOR.

APPLICATION FILED MAB. s. 1905.

UNITED STATES PATENT OFFICE MANUFACTURING COMPANY, OF DETROIT, MICHIGAN,A CORPORA- TION OF MICHIGAN.

RADIATOR.

Specification of Letters Patent.

Patented NOV. 21. 1905.

Application filed March 8, 1905. Serial N01 249,071.

To ctZZ whom it 114 any concern:

Be it known that I, BENJAMIN BRIsooE, a citizen of the United States,residing at Tarrytown, in the county of Westchester and State of NewYork, have in vented certain new and useful Improvements in Radiators,of which the following is a specification, reference being had thereinto the accompanying drawings.

The invention relates to radiators of that type more particularlydesigned for use as coolers for a circulating fluid, and especiallyadapted for motor-vehicles.

The invention consists in the novel construction by which greatefficiency is obtained at a minimum cost, as hereinafter set forth.

Figure 1 is a perspective of the completelyformed tube. Fig. 2 is anelevation illustrating the manner of assembling the tubes to form theradiator. Fig. 3 is an elevation, partly in section, of the completedradiator.

Fig. 4. is a section through a portion of the radiator, showing amodified construction.

In the construction of radiators for the purpose described it is verydesirable to obtain as much of a radiating-surface as possible within agiven area and also to limit the quantity of fluid in proximity to theradiating-surface. Heretofore these results have been obtained incertain constructions of radiators by assembling a large number of tubesin parallel relation and in close proximity to each other, the ends ofthe-tubes being connected either into perforated headers or joined insome other way. For such constructions drawn tubes are usually employed,and each of these must be closely joined to the adjacent tubesin orderto form a tight chamber for the fluid-circulating medium. The latter isforced through the spaces between the tubes, while the tubes themselvesare cooled by the air passing longitudinally therethrough. Suchconstructions are expensive, first, by reason of the cost of the tubingused and, second, on account of the labor and expense of joining thetubes to each other, so as to form a water-tight compartment.Furthermore, if the ple tubes, which are formed from sheet metal. I havefurther overcome danger of clogging the circulation by providing auniform spacing of the tubes sufficient to avoid lodging of sediment andhave further diminished the labor and difliculty in joining the ends ofthe tubes. The last two results are obtained by forming the multipletubes with swaged ends, which are sufficiently enlarged to hold the bodyportion of the tubes properly spaced when the ends are in close contact.Thus all that is necessary to seal the joints is dipping in solder.

The tubes are formed with a single locked seam-joint, as shown at b inFig. 1, and are assembled, preferably, by providing a form F of anysuitable configuration and then swaging the tubes within the form, asillustrated in Fig. 2, the tubes being all of precisely the same formand of a size than can be assembled in parallel rows, and where thelength of these rows is not an exact multiple of the diameter of thetubes the form may be filled either by single tubes H or multiple tubes,such as I, having a lesser number of sections/ When the entire form isfilled, the ends of the tubes are dipped into a solder-bath, thussweating solder into the joints between the enlarged ends it andcompletely sealing the same.

To complete the radiator, suitable headers, such as J, are connected tothe opposite sides of the assembled tubes. These headers are in freecommunication with the spaces between the tubes, so that thefluid-circulating medium can pass from the header on one side across tothe header on the opposite side or may travel over the top to the bottomin a gravity-circulating system. It is to be observed that there is freecommunication for circulation between the tubes in directions at rightangles to each other, and in case of any clogging between tubes of anyparticular row this will not interfere with the circulation of othertubes in the same row which are connected through the cross-passageswith other rows.

Another valuable feature in the construction is due to the fact that thetubes are formed of sheet metal which is malleable, and thus in case thecirculating fluid should become frozen they will yield to provide thenecessary expansion without breaking the joints.

In Fig. 10 is shown a modification in which the multiple tubes areformed by contracting portions of the metal in the central or bodyportion of the tubes, so that the enlarged ends are formed withoutexpansion. This is preferably accomplished by forming the dies withcorrugations which take up the excess of metal in the central portion ofthe tube. Thus while the length of contour is the same at the ends as atthe center of the tube the space inclosed by the latter is less thanthat of the former. These corrugationsz'in the tube also facilitate thecirculation by providing larger spaces and easier bends for the passageof the water.

I have shown the tubes comprising three units; but it is obvious thatthere may be a greater or a less number of units in the multiple, ifdesired, without departing from the scope of my invention.

What I claim as my invention is 1. A radiator, comprising a plurality ofassembled multiple-unit tubes, each tube being formed of a sheet-metalblank, having its opposite edges joined to each other and fashioned withopposite Zigzag walls to form a plurality of parallel passages; saidunits being joined to each other at both ends and spaced to formintervening sealed passages, the passages between adjacent rows of unitsbeing cross-connected between individual units, whereby circulationacross the radiator is permitted in directions at right angles to eachother.

2. A radiator comprising a plurality of assembled multiple-unit tubesthe ends of said tubes being enlarged and joined to each other to formsealed fluid-circulating spaces between the tubes.-

3. A radiator, comprising a plurality of as sembled multiple-unit tubeseach tube having its ends enlarged, whereby it is uniformly spaced fromadjoining tubes to form intervening passages, and theadjoining endsbeing sealed by soldering.

4:. A radiator, comprising a plurality of assembled multiple-unit tubes,each tube being enlarged at its opposite edges to contact closely withthe ends of adjacent tubes, and to provide a uniform space between theintermediate portions thereof, the joint between the ends of said tubesbeing sealed by soldering.

5. A radiator comprising a plurality of assembled tubes, the ends ofsaid tubes being of greater diameter than the central portion thereof,and the excess of metal in the latter being bent into corrugations, theends of said tubes being joined to each other to form sealedfluid-circulating spaces between the tubes.

6. A radiator, comprising a plurality of assembled, multiple-unit tubeswhich abut, being formed from a sheet-metal blank having its oppositeends secured to each other and fashioned into a Zigzag form, theopposite ends of said tube being of greater diameter than its centralportion, and the central portion being corrugated to take up the excessof metal, the ends of said units being joined to each other to formsealed spaces therebetween.

In testimony whereof I aifix my signature in presence of two witnesses.

BENJAMIN BRISCOE.

Witnesses:

JAs. P. BARRY, AMELIA VVILLIAMs.

